EFDA Amalgam and Composite Restorations 2

Question 1

Which type of cavity preparation design is MOST commonly used for amalgam restorations?

Accepted Answer

Black's preparation with 90-degree cavosurface margins

Answer

Beveled preparation

Answer

Chamfer preparation

Answer

Featheredge preparation

Question 2

When placing a matrix band for an amalgam Class II restoration, the band should be contoured to create:

Accepted Answer

A convex proximal contour with a tight contact

Answer

A flat contact area

Answer

A concave proximal contour

Answer

No contact with the adjacent tooth

Question 3

The trituration time for amalgam capsules is controlled to ensure:

Accepted Answer

Optimal consistency with proper plasticity for condensation

Answer

Maximum expansion of the restoration

Answer

Complete elimination of mercury vapor

Answer

Maximum setting time before carving

Question 4

Which bonding step in composite placement helps prevent post-operative sensitivity?

Accepted Answer

Application of a dentinal bonding agent

Answer

Etching for 30 seconds

Answer

Air drying the preparation completely

Answer

Using a self-curing composite

Question 5

The incremental placement technique for composite restorations is used primarily to:

Accepted Answer

Reduce polymerization shrinkage stress

Answer

Speed up the curing process

Answer

Increase the depth of cure

Answer

Eliminate the need for etching

Question 6

When carving an amalgam restoration, the explorer should be drawn along the:

Accepted Answer

Cavosurface margin with one tip on enamel and one on amalgam

Answer

Center of the restoration only

Answer

Occlusal surface in circular motions

Answer

Gingival margin only

Question 7

Which shade selection guideline should be followed FIRST when choosing a composite shade?

Accepted Answer

Evaluate shade on a hydrated tooth before isolation

Answer

Select the shade under bright operatory light

Answer

Match the shade to the patient's favorite color

Answer

Choose the lightest shade available